Fiber optic temperature measurement system is divided into three kinds, a fluorescent fiber temperature measurement, a distributed fiber temperature measurement, and a fiber grating temperature measurement.
1, fluorescent fiber temperature measurement
The monitoring host of the fluorescent fiber optic temperature measurement system is installed in the monitoring cabinet of the control room, and a monitoring computer is set on the operator console for remote monitoring.
Installation of fiber optic thermometer
The fiber-optic thermometer is installed on the back wall of the instrument panel in the upper part of the front of the switchgear cabinet to facilitate future maintenance.
Installation of fiber optic temperature sensor
Fiber-optic temperature sensing probes can be installed in direct contact on the switchgear contacts. The main heat generator of the switchgear is located in the joint of the static and moving contacts, but this part is under the protection of the insulating sleeve, and the space inside is very narrow. Therefore, the design of fiber optic temperature sensor should fully consider this problem, while the installation of accessories should be considered to maintain a safe distance from the moving contacts.
Installation in the switch cabinet cable joints can be used to special adhesive will be attached to the sensor in the cable joints after the use of special ties tied fixed.
Cabinet alignment: cabinet cables and pigtails should try to go along the cabinet corners along the line or go to a special slot with the secondary line bundled together, to facilitate future maintenance of the cabinet.
2, distributed fiber optic temperature measurement
(1) the use of distributed fiber optic temperature sensing equipment to sense the cable temperature and location information for signal detection, signal transmission, to achieve non-electricity detection, intrinsically safe and explosion-proof.
(2) The use of advanced distributed fiber optic temperature sensing as a measurement unit, advanced technology, high measurement accuracy; (3) Distributed fiber optic temperature sensing equipment to sense the cable temperature and location information for signal detection, signal transmission, intrinsically safe and explosion-proof.
(3) Distributed temperature-sensitive fiber optic cable long-term operating temperature range of -40 ℃ to 150 ℃, up to 200 ℃, a wide range of applications.
(4) The detector single-loop measurement mode, simple installation, low cost; can stay redundant spare core; (5) Real-time temperature sensing fiber optic cable, the temperature range of -40 ℃ to 150 ℃, up to 200 ℃, wide range of applications.
(5) real-time display of the temperature of each partition, and can display historical data and change curve, average temperature change; (6) the system can be used in a wide range of applications; (7) the system can be used in a wide range of applications.
(6) Compact system structure, simple installation, easy maintenance;
(7)Through the software, different warning values and alarm values can be set according to the actual situation; the alarm mode is diversified, including fixed-temperature alarm, temperature rise rate alarm and temperature difference alarm. (8) Through the software, data query: point by point query, alarm record query, query by interval, historical data query, statement printing.
3, fiber grating temperature measurement
In power plants and substations, fiber optic grating temperature measurement system can be used to monitor the temperature of the cable jacket and trench and cable tunnels, play the role of guardianship of power cables. At this time, the need for temperature measurement with fiber optic sensors affixed to the surface of the cable, through the fiber optic grating temperature measurement system to obtain real-time data on the surface temperature of the cable, together with the current flowing through the cable together to draw the relevant curves, so as to deduce the temperature coefficient of the core cable, according to the difference between the cable surface temperature and the temperature of the core wire to get the current and the surface temperature of the cable between the relationship. This relationship can provide a reference basis for the safe operation of the power system.
Post time: Oct-31-2024